Helium isotope ratios and pore gases in deep-sea sediments of the Japan Sea
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1992
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867169505172520960 |
|---|---|
| author | Sano, Yuji Sakamoto, Minoru Ishibashi, Jun-ichiro Wakita, Hiroshi Matsumoto, Ryo |
| author_facet | Sano, Yuji Sakamoto, Minoru Ishibashi, Jun-ichiro Wakita, Hiroshi Matsumoto, Ryo |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We have measured the 3He/4He and 4He/20Ne ratios and chemical compositions of gases exsolved from deep-sea sediments at two sites (798 and 799) in the Japan Sea. The 3He/4He and 4He/20Ne ratios vary from 0.642 Ratm (where Ratm is the atmospheric 3He/4He ratio of 1.393*10**-6) to 0.840 Ratm, and from 0.41 to 4.5, respectively. Helium in the samples can be explained by the mixing between atmospheric helium dissolved in bottom water of the Japan Sea and crustal helium in the sediment. The sedimentary helium is enriched in mantle-derived 3He compared with those from the Japan Trench and the Nankai Trough. This suggests that the basement of the Japan Sea has relatively large remnants of mantle-derived helium compared with that of the Pacific. Major chemical compositions of the samples are methane and nitrogen. There is a positive correlation between methane content and helium content corrected for air component. Based on the 3He/4He-Sum C/3He diagram, the major part of methane can be attributed to crustal and/or organic origin. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_777329 |
| institution | PANGAEA |
| language | en |
| publishDate | 1992 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Helium isotope ratios and pore gases in deep-sea sediments of the Japan Sea Sano, Yuji Sakamoto, Minoru Ishibashi, Jun-ichiro Wakita, Hiroshi Matsumoto, Ryo 128-798A; 128-799A; DRILL; Drilling/drill rig; Japan Sea; Joides Resolution; Leg128; Ocean Drilling Program; ODP We have measured the 3He/4He and 4He/20Ne ratios and chemical compositions of gases exsolved from deep-sea sediments at two sites (798 and 799) in the Japan Sea. The 3He/4He and 4He/20Ne ratios vary from 0.642 Ratm (where Ratm is the atmospheric 3He/4He ratio of 1.393*10**-6) to 0.840 Ratm, and from 0.41 to 4.5, respectively. Helium in the samples can be explained by the mixing between atmospheric helium dissolved in bottom water of the Japan Sea and crustal helium in the sediment. The sedimentary helium is enriched in mantle-derived 3He compared with those from the Japan Trench and the Nankai Trough. This suggests that the basement of the Japan Sea has relatively large remnants of mantle-derived helium compared with that of the Pacific. Major chemical compositions of the samples are methane and nitrogen. There is a positive correlation between methane content and helium content corrected for air component. Based on the 3He/4He-Sum C/3He diagram, the major part of methane can be attributed to crustal and/or organic origin. |
| title | Helium isotope ratios and pore gases in deep-sea sediments of the Japan Sea |
| topic | 128-798A; 128-799A; DRILL; Drilling/drill rig; Japan Sea; Joides Resolution; Leg128; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.777329 |